Evaluation of heat conduction in a laser irradiated tooth with the three-phase-lag bio-heat transfer model

Falahatkar, S.; Nouri-Borujerdi, A.; Mohammadzadeh, Ali; Najafi, Mohammad

doi:10.1016/j.tsep.2018.06.012

Cited by 7 publications

(2 citation statements)

References 19 publications

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“…In this numerical study, after laser irradiation, the Pennes bioheat equation was used to determine the temperature of the surrounding tissues and inflammation around the implant [ 37 ]. This equation assumes that the heat generated by blood circulation and metabolic processes is uniformly distributed within the biological tissues.…”

Section: Methodsmentioning

confidence: 99%

Numerical study on the three-dimensional temperature distribution according to laser conditions in photothermal therapy of peri-implantitis

Paik,

Kim,

Kim

et al. 2024

Int J Implant Dent

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Purpose Dental implants have been successfully implemented as a treatment for tooth loss. However, peri-implantitis, an inflammatory reaction owing to microbial deposition around the implant, can lead to implant failure. So, it is necessary to treat peri-implantitis. Therefore, this numerical study is aimed at investigating conditions for treating peri-implantitis. Methods Photothermal therapy, a laser treatment method, utilizes photothermal effect, in which light is converted to heat. This technique has advantage of selectively curing inflamed tissues by increasing their temperature. Accordingly, herein, photothermal effect on peri-implantitis is studied through numerical analysis with using Arrhenius damage integral and Arrhenius thermal damage ratio. Results Through numerical analysis on peri-implantitis treatment, we explored temperature changes under varied laser settings (laser power, radius, irradiation time). We obtained the temperature distribution on interface of artificial tooth root and inflammation and determined whether temperature exceeds or does not exceed 47℃ to know which laser power affects alveolar bone indirectly. We defined the Arrhenius thermal damage ratio as a variable and determined that the maximum laser power that does not exceed 47℃ at the AA’ line is 1.0 W. Additionally, we found that the value of the Arrhenius thermal damage ratio is 0.26 for a laser irradiation time of 100 s and 0.50 for 500 s. Conclusion The result of this numerical study indicates that the Arrhenius thermal damage ratio can be used as a standard for determining the treatment conditions to help assisted laser treatment for peri-implantitis in each numerical analysis scenario.

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Section: Methodsmentioning

confidence: 99%

Numerical study on the three-dimensional temperature distribution according to laser conditions in photothermal therapy of peri-implantitis

Paik,

Kim,

Kim

et al. 2024

Int J Implant Dent

View full text Add to dashboard Cite

show abstract

“…The temperature gradient is a constitutive variable in the DPL heat conduction equation, while the temperature displacement gradient is considered as a fundamental variable in the TPL heat equation [15]. The general form of the TPL non-Fourier heat equation has been presented by [15][16][17]. There are new parameters in the TPL non-Fourier equation such as k*, v and τυ that they are the rate of thermal conductivity, thermal displacement which satisfies dv/dt=T and phase-lag of thermal displacement gradient, respectively [16].…”

Section: Physical Model and Bio-heat Conductionmentioning

confidence: 99%

Stress behaviour across human tooth by temperature gradient resulting of laser irradiation

Falahatkar

Nouri-Borujerdi

Najafi

2020

JMES

Self Cite

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The authors report the simulation of temperature distribution and thermally induced stress in the premolar tooth under ND-YAG pulsed laser beam. The Three-Phase-Lag (TPL) non-Fourier model is proposed to describe the heat conduction in the human tooth with nonhomogeneous inner structures. A premolar tooth comprising enamel, dentin, and pulp with real shapes and thicknesses are considered and a numerical method of finite difference was adopted to solve the time-dependent TPL bio-heat transfer, strain and stress equations. The surface heating scheme is applied for simulation of laser therapy. The aim of this laser therapy is that the temperature of pulp reaches to 47oC. The results are achieved as a function of laser heat flux showed when laser beam is irradiated downward (from the top of the tooth), the temperature and thermally induced stress increase as a function of time. The temperature increment is high on the top layers of tooth that is a result of strong absorption of beams by enamel. The thermal stress and strain in the enamel and dentin layers are more than the pulp layer that is a result of weak thermal expansion of them proportional to the pulp layer.

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Phase-Lag Models

Zhmakin

2023

Non-Fourier Heat Conduction

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Evaluation of heat conduction in a laser irradiated tooth with the three-phase-lag bio-heat transfer model

Cited by 7 publications

References 19 publications

Numerical study on the three-dimensional temperature distribution according to laser conditions in photothermal therapy of peri-implantitis

Numerical study on the three-dimensional temperature distribution according to laser conditions in photothermal therapy of peri-implantitis

Stress behaviour across human tooth by temperature gradient resulting of laser irradiation

Phase-Lag Models

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